Method for attaching back-hoe

ABSTRACT

The present disclosure relates to the method for attaching backhoe which comprises disconnectably suspending the slide-bed provided on the swing bracket of the back-hoe on the mountadopter provided on a tractor-shovel or bulldozer in such a manner that said slide-bed can be slid in the lateral direction to the effect that digging operation on the side of the body can be smoothly carried out even if said slide-bed be made smaller than the width of the body, and the connection or disconnection of back-hoe can be simply and smoothly carried out at any time.

United States Patent 1191 Mari [45] Apr. 24, 1973 [5 METHOD FOR ATTACHING BACK- 3,400,842 9/1968 Owen .....214/13s c HOE 3,407,945 10/1968 Leese ..2l4/l38 C [75] Inventor: lkuo Mori, Komatsu-shi, Japan FOREIGN PATENTS OR APPLICATIONS [73] Assign: g z t T g Kmnats" 269,220 2/1965 Australia ..214/13s c elsa us 0, 0 yo, apan [22] Filed: J l 15, 1970 Primary Examiner-Richard J. Herbst Assistant ExaminerV. A. DiPalma [211 App! 54970 An0rneyCushman, Darby & Cushman 30] Foreign Application Priority Data July 15, 1969 Japan ..44/55578 [57] ABSTRACT The present disclosure relates to the method for at- [52] US. Cl. ..29/148.3, 172/274, 127121714318, taching back hoe which comprises disconnectably suspending the slide-bed provided on the swing "Bzlh gfiiggigf bracket of the back-hoe on the mount-adopter pro- 214/138, vided on a tractor-shovel or bulldozer in such a manner that said slide-bed can be slid inthe lateral direction to the effect that digging operation on the [56] References Cited side of the body can be smoothly carried out even if said slide-bed be made smaller than the width of the NITED TATE PATENTS body, and the connection or disconnection of back- 2,994,446 8/1961 van Auwelaer et a1. ..214 13sc can be Simply and smoothly carried any 3,117, 85 1/1964 Davis ..2l4/l38C 3,215,282 11/1965 Wiemann et a]... 214/138CX 3,220,487 11 1965 1 11611 ..172 274 3clalms9nl'awing Figures 3,263,837 8/1966 Noller et al. ..214/138 C 3,275,163 9/1966 Schaeff ..214/138 RX Patented April 24, 1973 3,728,768

4 Sheets-Sheet 1 BUG) INVENI'OR. I 4 00 Mom" BY Gus/4m DA may 4 Cl/sHM;4M

Patented April 24, 1973 4 Sheets-Sheet 2 v INVENT-UR.

' 12 00 MofiI BY flusl/mAA'fixmay 4 Casi/MAM Armin 5V5 Patented April 24, 1973 4 Sheets-Sheet 5 Fig. 6

' I4 IO 26 r 250 I4 1N VENTOR IAl/d Mom BY Gus/MAM $A/yay k Sly/"AM ATTORNEYS Patented April 24, 1973 4 Sheets-Sheet 4 METHOD FOR ATTACHING BACK-HOE The present invention relates to an apparatus for attaching back-hoe and more in particular this invention relates to an apparatus for attaching back-hoe to so called vehicles provided with back-hoe such as tractor shovel or bulldozer in such a manner that said back-hoe can be slid and can be removed to the effect that side groove digging can be carried out.

Generally speaking, back-hoe has the slide bed B for horizontally moving the digging portion A in the lateral direction as is shown in FIG. 1 and FIG. 2, and the slide bed B is fixed on the mount adopter D provided on the rear portion of the vehicle C, and when the digging portion A is horizontally moved by using said slide bed B as the guide, groove digging can be carried out on the side of the vehicle C in most cases.

Therefore, in accordance with the above mentioned conventional back-hoe width I of slide bed B must be made larger than the width of the vehicle C in order to carry out the digging on the side of the vehicle, as is shown in FIG. 2, and therefore when the vehicle C is desired to be transported while the above mentioned back-hoe is mounted on the vehicle C, it goes beyond the loading limitation of said vehicle C and therefore in transporting the back-hoe, said back-hoe is required to be removed from the vehicle C.

When the above described point is taken into consideration, if the width 1 is made smaller than the width of the vehicle, it is possible to transport the vehicle C provided with back-hoe without going beyond the loading limitation, but in this case, the sliding span of backhoe in the horizontal direction is reduced, and the desired side groove digging cannot be carried out satisfactorily.

On the other hand, when said slide bed B is mounted on the mount adopter D providedon the rear portion of the vehicle C, in accordance with the prior art, slide bed B and mount adopter D are connected to each other with pin E through brackets 8,, D, unitedly provided on said slide bed B and said mount adopter D, or as is shown in FIG. 4, the bracket D unitedly provided on the mount adopter D is bound onto the slide bed B with the bolt F.

When the above mentioned conventional measures for mounting back-hoe onto the vehicle should be employed, there is such a draw-back that it is necessary to coincide pin and hole of the slide bed B and mount adopter D as is shown in FIG. 3, or coincide bolt and hole as in FIG. 4, and it is very troublesome and takes labors and time in attaching said slide bed B onto the mount adopter D when the determination of positions of the slide bed B and the mount adopter D is carried out while the vehicle C is driven.

In accordance with the present invention, the drawbacks in the conventional attachment of the back-hoe can be all removed, and the first object of the present invention is to provide an apparatus for attaching backhoe in such a manner that the slide bed provided on the end of the back-hoe can be perpendicularly engaged against the mount adopter as the body to which backhoe is attached so that said back-hoe can be slid in lateral direction optionally.

The second object of the present invention is to carry out the operation for removing back-hoe from the mount adopter and to carry out the back-hoe sliding adjustment more smoothly and more easily than the prior art by providing the hook form engaging portion on the slide bed as the means for suspending and engaging said slide bed on the mount adopter, providing the receiver portion for engaging said hook form engaging portion, suspend-engaging said hook form engaging portion on said receiver portion, to slide said slide bed in the lateral direction as far as the predetermined position, thereafter disconnectably fixing said slide bed on the mount adopter.

The third object of the present invention is to transport the vehicle with back-hoe without going beyond the loading limitation and to smoothly carry out the side groove digging on the side of the vehicle while the sufficient amount of moment of the back-hoe is made in the lateral direction, even if said slide bed be smaller than the width of the vehicle as an example of a body to which back-hoe is attached, by employing the back-hoe attaching method wherein the hookform engaging portion of the slide bed is engaged onto the receiver portion of the mount adopter in such a manner that said back-hoe can be optionally slid to be adjusted as described above.

FIG. 1 is a side view of bulldozer shovel shown in phantom with back-hoe provided on the rear portion of said bulldozer shovel; 7

FIG. 2 is a front view of an embodiment of FIG. 1;

FIG. 3 and FIG. 4 are the side views showing the respectively different conventional back-hoe attaching portion;

FIG. 5 is a diagram showing the state of the slide bed attached onto the mount adopter;

FIG. 6 is a fragmentary side view in partial cross-section of a portion of an embodiment of the present invention;

FIG. 7 is a diagram showing the cross sectional view of the portion where the slide bed and mount adopter are bound with a spiral rod;

FIG. 8 is a diagram showing an aslant view of said spiral rod;

FIG. 9 is a perspective view of the mounting state of the slide bed and the mount adaptor.

The following is an explanation about the embodiment of the present invention in accordance with FIG. 1, FIG. 2 and FIG. 5 through FIG. 8.

The'back-hoe in which the apparatus of the present invention is applied, has the main 'boom 3 whose end portion is connected to the swing bracket 2 to be provided on the tractor shovel C; stick boom 4 whose end portion is supported on the free end portion of said main boom 3 in such a manner that said stick boom 4 can be freely moved up and down, and the bucket 6 supported on the free end portion of said stick boom 4 through link mechanism 5 and said main boom 3 can be moved up and down by the shrinking operation of the boom cylinder mechanism 7 provided on the main boom 3 and the main bracket 2, and the stick boom 4 is moved up and down by the shrinking movement ofthe stick boom cylinder 8 mutually provided on the stick boom 4 and the main boom 3, and the bucket 6 is moved by the shrinking movement of the bucket cylinder 9 mutually provided on the stick boom 4 and the link mechanism 5.

The above described swing bracket 2 is know in the prior art to be able to move horizontally in the lateral direction with respect to the slide bed 10.

suspension engaging member 14 and on the front surface of the lower lateral mounting member 13 is rigidly mounted a tightening receiving member 16.

The engaging member 14 in this embodiment is a metal wire whose cross section is in the form of invariable reversal groove, and the receiving member 16 for fixing the same has the angular form cross section with flange 17 on the lower fringe portion, and the stage portion 18 is formed on the internal corner of the end portion of said flange 17.

n the other hand, a plural number of cut grooves 19 for connecting or disconnecting the binding members with appropriate intervals between said grooves are provided in advance from the end portion of said flange 17.

The binding tool 20 to be inserted into said out grooves 19 of the receiving member 16 for binding is in the form of a bolt composed of wider head member 21 whose front view is rectangular, and spiral rod 22 unitedly projected almost in the center of said head member 21, and the binding tool 20 has the nut 23 capable of freely being disconnected from or connected to the spiral rod 22.

On the other hand, on the fringe portion of the longer side of said head member 21 of the binding tool 20, aslant surface 21a is formed.

As shown in FIG. 9, the slide bed of the above mentioned structure is mounted on the rear portion of the tractor shovel C to a pair of right and left mount adaptors D mounted by appropriate means such as bolts, and at the rear end of the mount adaptors D is fixed an engaging plate 25 by bolts 32 in such a manner that the engaging plate 25 has a height contacting with the suspension engaging member 14 and tightening receiving member 16 of the slide bed 10, and is horizontally movable in the lateral direction with respect to the slide bed 10. At the upper and lower edge portion of the engaging plate 25 are formed aslant surfaces 26 and 27 contacting on the aslant surface of the binding tool 20 with the internal surface of the hook form engaging portion; of the engaging member 14 for suspension.

The following is an explanation about the method for attaching back-hoe l to the tractor shovel C.

The back-hoe 1 is erected with the bucket 6 and the Y slide bed 10 by appropriately bending the main boom 3 and the stick boom 4 downwards, and in this state the shrinking legs 11 and the respective cylinders 7, 8 and 9 are connected to said oil pressure circuit of the tractor shovel C.

The slide bed 10 is raised by shrinking the respective shrinking legs 11 and the operations of the shrinking legs 11 are stopped when the hook form engaging portion 15 is raised up to the most appropriate position for attaching the back-hoe 1.

Next, the tractor shovel C is driven, and the engaging plate 25 mounted to the mount adopter D are placed between the engaging member 14 of the slide bed 10 and the binding receiving member 16.

In this case, the upper edge of the engaging plate 250 is contacted against the engaging member 14 of the slide bed 10, at the lower portion of the hook form engaging portion 15, and the lower edge of the engaging plate 25 is contacted against the staged portion 18 of the binding receiving member 16.

When the shrinking legs 11 of the slide bed 10 are reversally shrunk in the opposite manner as in the Therefore, the slide bed 10 is suspended on the.

upper edge of the engaging plate 25 mounted to the mount adaptor D by means of the hook form engaging portion 15, and accordingly is slidably adjustable laterally as a guide of the upper edge of the engaging plate 25, and the slide bed 10 is slide-adjusted as far as the position in accordance with the state of operation, and when the position adjustment of the slide bed 10 is terminated, the spiral rod 22 of the binding tool 20 is inserted into the cut grooves 19, and the aslant surface 21a of the head member 21 of the binding tool 20, is contacted against the aslant surface 27 of the lower edge of the engaging plate 25. Next, in the above described state, the nut 23 is engaged against the spiral rod 22 of the binding tool 20, and by binding the same the above mentioned slide bed 10'and the mount adopter D can be bound to attach the back-hoe 1 to the rear portion of the tractor shovel C.

On the other hand, when change of the position of the operation by the back-hoe is made, or when the back-hoe is removed, it is possible to remove the binding tool 20 from the cut groove 19 without removing the'nut 23 from the spiral rod 22, only by loosening the nut 23 of the binding tool 20.

Therefore, the operation for connecting the binding tool 20 to said cut grooves 19, or for disconnecting the binding tool 20 from said cut grooves 19 can be very easily carried out.

Thus, when the binding tool 20 is removed from the cut grooves 19, the slide bed 10 is slide-adjusted, to change the place of operation by the back-hoe 1, and at the same time while the binding tool 20 is being removed, the shrinking legs 11 on both sides of the slide bed 10 are expanded to raise the slide bed 10 so that the engaging member 14 is removed from the upper engaging plate 25a of the mount D, and therefore when the tractor shovel C is driven forwards, the back-hoe 1 can be removed from said tractor shovel C.

The upper engaging support plate 25a and the lower engaging supporter plate 25b can be separated or united in the above mentioned embodiment, and the shrinking legs 11 on both sides of the slide bed 10 are not restricted to the oil pressure cylinders, but they can be of screw rod structure.

In accordance with the present invention, the slide bed is adapted to slide in the lateral direction relative to the mount adaptor fixedly secured to the rear portion of a vehicle, which in combination with the movement of the digging portion slidably fitted to the slide bed enables the span of movement of the digging portion to be made sufficiently large without enlarging the lateral width of the slide bed. Therefore, the ditching operation of the vehicle can be carried out smoothly and in a wide range.

Further, according to the present invention, as mentioned above, it is unnecessary to make the lateral width of the slide bed larger than that of the vehicle. Therefore, it is possible to transport the vehicle with the back-hoe mounted thereon.

Still further, according to the present invention, the slide bed can be slidably moved to a desired position along the engaging plate with the downwardly directed hook form of the engaging member being engaged with the upper edge of the engaging plate which is fixedly secured to the rear portion of the mount adaptor. Therefore the position of the slide bed relative to the mount adaptor can be adjusted very easily. Upon completion of the adjustment of the slide bed, the lower end portion of the lower engaging plate is fixedly secured to the slide bed by means of the binding tool inserted through one of the grooves on the lower end portion of the receiving member for binding the front lower portion of the slide bed to the engaging plate, and, therefore, the slide bed can be secured to the engaging plate very easily.

ln cases where it is desireable to remove the slide bed from the mount adaptor or adjust the position of the slide bed relative to the mount adaptor in order to change the place at which the ditching operation is effected, it is possible to take away the binding toolsfrom the grooves by only loosening the nuts without removing them from the spiral rods. Thus, the fitting and removal of the binding tool can be made in a verysimple manner.

What is claimed is: Y 1. A method for attaching a back-hoe comprising:

the suspending ofa back-hoe on a slide bed by means of a swing bracket attached to said back-hoe in such a manner that said swing bracket is laterally movably securable to said slidebed; the suspending of said slide bed from a mount adaptor attachable to a tractor, in such a manner that said slide bed is laterally movably securable to said mount adaptor;

the moving of said back-hoe along said slide bed to a desired position for use thereof; and the securing of the back-hoe in the selected position relative to said slide bed by a first releasable securing means; the moving of said slide bed along said mount adaptor to a desired position for use of said back-hoe and the securing of said slide bed to said mount adaptor by a second releasable securing means.

2. A method for attaching a back-hoe according to claim 1 wherein said mount adaptor is attachable to said slide bed in any one of a plurality of predetermined positions established by said second releasable securing means, there being a receiving member attached to said slide bed at the lower portion thereof and having a plurality of evenly spaced grooves in an outer edge thereof, a hook-shaped member attached at an upper portion of said slide. bed in parallel spaced relationship to said receiving member, said mount adaptor having an engaging plate attached to one end thereof and'having upper and lower edge portions,

said method including sliding said slide bed along said engaging plate between said hook-shaped mernber and said receiving member; and securing a binding tool in one of said grooves so as to bind said slide bed to said engaging plate in one of said predetermined positions from which said back-hoe is operable.

3. A method for attaching a back-hoe according to claim 2 wherein a binding tool having a screw portion is disposed in said groove and extends through the opposite side of said receiving member, said binding tool also having a mating surface corresponding to a back surface portion of said engaging plate,

saidmethod including binding said engaging plate against said slide bed by tightening a nut on said screw portion. 

1. A method for attaching a back-hoe comprising: the suspending of a back-hoe on a slide bed by means of a swing bracket attached to said back-hoe in such a manner that said swing bracket is laterally movably securable to said slide bed; the suspending of said slide bed from a mount adaptor attachable to a tractor, in such a manner that said slide bed is laterally movably securable to said mount adaptor; the moving of said back-hoe along said slide bed to a desired position for use thereof; and the securing of the back-hoe in the selected position relative to said slide bed by a first releasable securing means; the moving of said slide bed along said mount adaptor to a desired position for use of said back-hoe and the securing of said slide bed to said mount adaptor by a second releasable securing means.
 2. A method for attaching a back-hoe according to claim 1 wherein said mount adaptor is attachable to said slide bed in any one of a plurality of predetermined positions established by said second releasable securing means, there being a receiving member attached to said slide bed at the lower portion thereof and having a plurality of evenly spaced grooves in an outer edge thereof, a hook-shaped member attached at an upper portion of said slide bed in parallel spaced relationship to said receiving member, said mount adaptor having an engaging plate attached to one end thereof and having upper and lower edge portions, said method including sliding said slide bed along said engaging plate between said hook-shaped member and said receiving member; and securing a binding tool in one of said grooves so as to bind said slide bed to said engaging plate in one of said predetermined positions from which said back-hoe is operable.
 3. A method for attaching a back-hoe according to claim 2 wherein a binding tool having a screw portion is disposed in said groove and extends through the opposite side of said receiving member, said binding tool also having a mating surface corresponding to a back surface portion of said engaging plate, said method including binding said engaging plate against said slide bed by tightening a nut on said screw portion. 